AMD launches its latest RX 500 series graphics cards today, refreshing its Polaris lineup for the sub-$300 USD market. On our review bench is the Nitro+ RX 580 from Sapphire featuring a 1450MHz boost clock out of the box, 2304 stream processors, and 8GB GDDR5 memory. While the RX 500 series won't deliver earth shattering performance or mind blowing innovations, it will still serve the very legit purpose of offering a new upgrade option for users on budget still rocking 2+ year-old graphics cards.